Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Foundation Engineering, Geotechnical Uncertainty, and Reliability-Based Design
Modern geotechnical engineering is slowly embracing uncertainty directly. Design equations for foundations often are cast in some type of reliability-based design (RBD) format that can range from rather simplistic to relatively sophisticated. For the more advanced design formats, the resistance factors attempt to capture some key geotechnical issues. Generic guidelines are used often in this overall evaluation of ground conditions and their variability. Thorough local site evaluations can improve on these generic guidelines. Unfortunately, in some simplified RBD, the ground is simply treated as another structural engineering entity that is characterized by a single resistance factor defined solely by broad material type, such as clay or sand. Actual ground conditions, quality of investigation, and other related issues are not addressed directly in these resistance factors. Hopefully these issues are addressed in the design evaluation, but design codes are lax in this regard. This paper will discuss some pros and cons of these design issues in foundation engineering. It will then stress the importance for the geotechnical community to improve how RBD formats are being employed in design. Unfortunately, the tendencies in most design code applications are to simplify, rather than quantify more thoroughly. This approach must be changed. Suggestions for improvement are given.
Foundation Engineering, Geotechnical Uncertainty, and Reliability-Based Design
Modern geotechnical engineering is slowly embracing uncertainty directly. Design equations for foundations often are cast in some type of reliability-based design (RBD) format that can range from rather simplistic to relatively sophisticated. For the more advanced design formats, the resistance factors attempt to capture some key geotechnical issues. Generic guidelines are used often in this overall evaluation of ground conditions and their variability. Thorough local site evaluations can improve on these generic guidelines. Unfortunately, in some simplified RBD, the ground is simply treated as another structural engineering entity that is characterized by a single resistance factor defined solely by broad material type, such as clay or sand. Actual ground conditions, quality of investigation, and other related issues are not addressed directly in these resistance factors. Hopefully these issues are addressed in the design evaluation, but design codes are lax in this regard. This paper will discuss some pros and cons of these design issues in foundation engineering. It will then stress the importance for the geotechnical community to improve how RBD formats are being employed in design. Unfortunately, the tendencies in most design code applications are to simplify, rather than quantify more thoroughly. This approach must be changed. Suggestions for improvement are given.
Foundation Engineering, Geotechnical Uncertainty, and Reliability-Based Design
Kulhawy, Fred H. (Autor:in)
Geo-Risk 2017 ; 2017 ; Denver, Colorado
Geotechnical Safety and Reliability ; 174-184
01.06.2017
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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